Wrench.



I No. 859,020. TATBNTTD JULY 2, 19o?.

alza y RoBETA.SM/TH R. A. SMITH.

WRENCH. APPLIOATIONTILBD JUNE 2.1906.

/VE N TOR W/T SSES A TTOHNEYS ROBERT A. SMITH, OF LAURELVILLE,PENNSYLVANIA.

WRENCH.

Specification of Letters Patent.

Patented July 2, 1907.

Application filed June 2,1906. Serial No. 319,859.

To all whom it4 may concern:

Be it known that I, ROBERT A. SMITH, a citizen of the United States,residing at Laurelville, in the county of Westmoreland and State ofPennsylvania, have invented an Improvement in Wrenches, of which thefollowing is a specication.

My invention is an improvement in the class oi pipe Wrenches, and thefeatures of novelty are hereinafter described and specifically indicatedin the claims.

In the accompanying drawing, Figure l is a side view of one form of myinvention; Fig. 2 is a transverse section on the line 2 2 of Fig. I;Fig. 3 is a transverse section on the line 3 3 of Fig. l; Fig. 4 is asimilar section, the lever for rotating the eccentric nut being shownclosed in one figure and thrown open in the other; and Fig. 5 is a sideview of a wrench similar in essentials to that shown in Fig. l-a portionbeing broken away to show interior constructionsave that the pivoted jawfor the pipe wrench is attached directly to the shank instead of anenlarged head thereon. Fig. 6 is a view illustrating the practical useand operation of the wrench.

I will first describe my invention as indicated in Figs. l to 4 and Fig.6.

l indicates the shank which is provided on one side with teeth l, and 2a fixed head thereon which coperates with the sliding jaw projectingfrom the slidable head 3 to orm a monkey wrench. To the head or iXed jaw2 on the opposite side of the shank is pivoted a jaw 4 which forms apart oi the pipe wrench, the same having a right angular' notch 5 on theinner side to receive a pipe. Said notch is roughened or corrugatedtransversely to give a strong friction hold on the pipe. The jaw ispivoted at its inner angle 6, and a plate spring 7 is arranged behind itin such manner as to tend to throw it inward or toward the movable jaw 3o the pipe wrench. The head carrying the jaws 3f is detachably securedto a slotted head 3b, by means of a part 3 which is grooved lengthwiseto receive the shank l ofthe wrench. For the purpose 0l locking themovable jaws 3, 3", at any required point on the shank, that is to sayat any required distance from the pivoted jaw 4, I provide an eccentricnut or screw 8 which is pivoted at 9 in the parts 3, 3b. The same is cutout lengthwise at l0 on o'ne side, whereby it is rendered eccentric.Thus, when such valve or cutout portion is arranged adjacent to theteeth I of the shank l, the jaw 3, may be slid on the shank and thusadjusted to any required point thereon; but when the nut or screw 8 isrotated to the position indicated in Figs. I and 2, its thread isengaged with the teeth l, and the jaw 3f, are thereby locked.

The shape of the inner face of the pivoted jaw 4 is very advantageous ascompared with jaws arranged in the same general relation to the shankand sliding jaw of a wrench of this class. The right angular recessenables the jaw 4 to take a firm grip on pipe, what I have sometimestermed a wrapping grip, which will prevent the pipe slipping and at thesame time enables the jaw to be quickly released from the pipe when therotation of the wrench around the pipe is reversed. For the purpose ofthus rotating the nut or screw 8, I employ a lever ll whose enlargedhead `lla-see Fig. S-is clamped on the extended journal oi the nut 8.The body oi the lever is cut out in such manner as to adapt it to fitaround the wrench shank as indicated in the said Fig. 3, so that thesame lies close alongside the laterally projecting portion oi the head3b and is flush with the outer side of the same.

Thus the lever offers no obstruction in the use of the wrench. The freeend of the lever is provided with a lug 1lb-see Figs. l and 3-whichserves as a thumb catch enabling the lever to be readily opened orclosed. The levers are held normally locked in the position indicated byfull lines Fig. 3, or in the unlocked position indicated by dotted linesFig. 3 and full lines Fig. 4, by means of a bar spring l2, the free endoi the same resting upon the enlarged head Ila of the lever and theother being secured to the part 3b of the sliding attachment. When thefree end of the spring l2 abuts the inclined shoulder on the head llfLof the lever 11,

it is held locked as shown in Fig. 3; but upon applying due pressure tothe thumb piece 1lb, the lever Il may be thrown open, and in such mannerthe free end of `the catch will ride over the inclined shoulder o thelever head lltL as indicated in Fig. 4. Thus in any case the pressure ofthe spring holds the lever in either oi the two required positions; thatis to say, in the position for locking the nut 8 with the shank teeth l,or in the position to bring the flattened side l0 opposite the teeth la,in which case the nut and the jaws 3, 3, and head 3l, may be slidalongthe wrench shank.

In the form of wrench shown in Fig. 5, the liXed head or jaw 2 shown inFig. l, is dispensed with, and the pivoted pipe-wrench jaw 4L is pivoteddirectly to the shank lb, the end of the same being cut away or beveledat I3, and the jaw 4a being provided with a sleeve that embraces thehead oi the said shank l. A spring 7!L is attached to the jaw 4fL andits free end enters a notch or groove in the shank as shown. Thus thejaw proper is held normally inclined or projected toward the slidablejaw 3a, as Shown. The screw 8% is in this instance toothed on one sideonly, the remaining portion being smooth so that it may be engaged withor disengaged from the teeth of the shank lb in the same manner as thescrew 8 before described.`

I claim:

In a wrench of the class indicated, the combination, with a toothedshank with a fixed and sliding jaw, and a frame constituting anattachment of the sliding jaw comprising,` the parts 3 3c of the lockingattachment consisting of an interrupted screw journaled coneentricallyat its ends in the frame of the sliding jaw, the lever 11 secured to oneof the screw journals and adapted to fit around the Wrench shank, and aspring attached to the part 3b on the opposite side of the shank andadapted to engage at its free end with the shoulderof the lever forlocking it in the closed position, both the lever and the spring lyingflush with the head 3, as shown and described.

ROBERT A. SMITH.

Witnesses:

WM. S. YARD, C. R. LEIGHTY.

